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Old 02-13-2021, 12:18 PM   #1
alfatv
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Default Sharp LC-65N7004U LED type

I got this 65" which apparently is rare as there are very few LED strips on sale, all overpriced. This one for example, also take a look at pictures:
https://www.tvparts.ca/tvdetail.php?id=15179

I need advice on LED type.
The original one has size of 3030 or 2828.
I tried 2835 and it's just too bright and also creates bright spot, probably not matching the lens.
I measured voltage drop, it's 3.3V

I will keep trying other LEDs, but I am looking for advice from someone who has practical experience with this type or similar.
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Old 02-14-2021, 03:52 PM   #2
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Default Re: Sharp LC-65N7004U LED type

Quote:
Originally Posted by alfatv View Post
I need advice on LED type.
The original one has size of 3030 or 2828.
.
there are no use of words OR to use at TV LEDs so what are the actual size .. can you show here the the defect one from both side, or the label of the strings.

yours measurement 3.3V it sound to me the LEDs are from invotech which they are 4.7V.
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Old 02-14-2021, 09:36 PM   #3
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Default Re: Sharp LC-65N7004U LED type

Diah, do you have more info about these invotech LEDs? Can these be purchased? Any substitutes?
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Old 02-15-2021, 12:37 AM   #4
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Default Re: Sharp LC-65N7004U LED type

Quote:
Originally Posted by alfatv View Post
I got this 65" which apparently is rare as there are very few LED strips on sale, all overpriced. This one for example, also take a look at pictures:
https://www.tvparts.ca/tvdetail.php?id=15179

I need advice on LED type.
The original one has size of 3030 or 2828.
I tried 2835 and it's just too bright and also creates bright spot, probably not matching the lens.
I measured voltage drop, it's 3.3V

I will keep trying other LEDs, but I am looking for advice from someone who has practical experience with this type or similar.
At what current did you drive the LED at to get the Vf of 3.3V?
Vf of LED will vary with drive current. Your LED is probably single LED.
Here is example of LG INNOTEK dual LED, Vf of 6.3V is typical for DUAL at full current..

The typical single LED is about 3 ~ 3.6V Vf
3528 2835 SMD LED 1W LG Cool White
Model Number: LATWT470RELZK
Brand Name: LG
Forward Current:400mA
Size:3.5*2.8*0.6mm
lumens: 100LM
Forward Voltage:3.05-3.65V
Attached Files
File Type: pdf Product Family Data Sheet_3030 Series(Rev.8)_DUAL.pdf (1.27 MB, 5 views)
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Old 02-15-2021, 02:51 AM   #5
Diah
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Default Re: Sharp LC-65N7004U LED type

Quote:
Originally Posted by alfatv View Post
Diah, do you have more info about these invotech LEDs? Can these be purchased? Any substitutes?
yes his LED are single... but i think there are error at his measurements.. this why...

we need first to know exactly yours size ( TYPE ) measurements and the LED chassis ( downside figure )( the downside figure are a key to know more detail of the LED unit ), this why i asked you to show us !!!

invotech LEDs are available at aliexpress but only few sellers certificated of original parts, the others are duplicated.

Last edited by Diah; 02-15-2021 at 02:52 AM..
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Old 02-15-2021, 04:17 PM   #6
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Default Re: Sharp LC-65N7004U LED type

Thank you both, here is some update.
Original LED was destroyed during removal.
The current is 310mA
I also found similar LED I believe from Vizio D50F-E1.
It works well, but the voltage accross it is 3.6V.
The key feature is very small yellow dot which is probably needed for this type of lens.
I looked through Innotek catalog and they don't have this type.
The thick terminal is negative.
I attached pictures without LED and with Vizio LED.
Attached Images
File Type: jpg IMG_1017.jpg (405.7 KB, 10 views)
File Type: jpg IMG_1020.jpg (319.1 KB, 11 views)
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Old 02-15-2021, 06:11 PM   #7
Diah
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Default Re: Sharp LC-65N7004U LED type

this didn't help..
you have label on the strings show us over here..
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Old 02-15-2021, 06:17 PM   #8
alfatv
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Default Re: Sharp LC-65N7004U LED type

It's in the first link
HD650S1U52+2019040401+HXLB19054
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